gerontology

Geriatrics is the branch of medicine that deals with the diseases and problems
associated with old age.

USAGE:

"Emma had been on a gerontology ward where most of her patients were
suffering dementia and a laundry list of physical ailments associated
with advanced age."
Gary Braver; Tunnel Vision; Forge Books; 2011.

And the fox said to the little prince: men have forgotten this truth, but you must not forget it. You become responsible, forever, for what you have tamed. -Antoine de Saint-Exupery, author and aviator (1900-1944)